Historedia
Episode 3 of 4

Ratification and Authorization

When
16-26 February 1859
Where
U.S. Government
Part of
United States signs treaty with the Yankton Sioux

The Senate ratified the treaty on February 16, 1859, and President James Buchanan authorized it ten days later.

The treaty took effect upon ratification by the Senate and the President. The Senate ratified the treaty on February 16, 1859, and President James Buchanan authorized it ten days later, finalizing the legal status of the agreement.

Sources

  1. Yankton Treaty Wikipedia, revision of 2026-10-03
  2. Yankton Sioux Tribe Wikipedia, revision of 2026-10-02

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.